Will lasik help or hinder optic neuritis?

Neither: Lasik does not help or hinder any other eye diseases. It can only decrease need for glasses and contact lenses.

Neither: Lasik changes the curvature of the cornea to reduce nearsightedness(myopia) and has no adverse effect on the optic nerve. If the optic nerve has been damaged then lasik will not improve the visual function , it only changes the focus of the image on the retina.

Optic neuritis: Once the episode of optic neuritis resolves, any remaining decreased vision or color abnormality is permanent and can not be corrected with lasik.